Gas-burner.



FRANCIS J'. DOYLE; 0F CHICAGO, ILLI'NOIS;

GAsURNER.

Specification of Letters Patent i Patented Ilary 13, 1913.

Application ttd'Iiily 19, 190). SeriaLNo. 508,407.

ates' an intense heat duc tu the increasedy etlir-.iency ot combustion; to provide a construction in which the supply of air to the hin-ner is autoinat'icaily controlled'hya thc pressure of gas through the jet; to provide a peculiar construction of the outlet end of the burner which prevents the thune, whenv low, from being blown out by a draft of air; to provide, a construction which prevents dust', dirt .",ete.. from accumulating within the hurur" without, however, in .an ,Wayi iinpairing the4 etliciency of the lat en; to

provide :i simple and etlicient construction, which can he manufactured lat avvery 10W cost; and in general to provide an imeiroved` construction of the character 'refeir to.

-The invention consists in the matters hereinafter described and more particularly pointed out iu the appended claims. f;

hled view of a kitchen boiler and Water heater, equipped with thi-ee of my improved burners, part. of the lieaterheing broken out; to more clearly .show the disposition of the burners. Fig. 2 is a view iartly in axial section and partl) in side c eration of the heater shown as'dctachei'l. Fig. 3 is a view partly in side elevation :rnd partly in axial sect ion of the improved gasbr'fier.

Referring to the drawings, 1 designates as a whole the water heater, and 2 im ordinary' kitchen` tank` which is conveniently supported upon an elevated standard or hase 3.

tde ignates a supply pipe communicating with any suitable. water supply under pressure, entering the upper eud of t-lie tank and extending inside the latter down to and delivering at :i point. near the bottom 'of the .heated h v gasburners. and tothis end a 'a' burner, designated as a whole 13.

tank, as indicated in the dotted lines at 4. lV ith the central portion' 'of the bottom of 'the tank connects` :i`circi`ilatiii f r pipe 5 which leads to and ,connects with one side-of the heater .1, as indicated at t'. From the top of the` heater a stand-pipe 7 leads to and coininuiiicates with the upper cud of the tank, mnveniently at the center thereof. :is shown. From the staii'd-pii'ie 7 :i small hranclr-pipe S` leads oti' "to :in v suitable spigot; i* this branch-pipe beiiigeontrollcd*by a turn-cock 9, aiidthe staudpipe siiiilai'ly controlled by a turn-cock 1U. 'llie heater is shown as as supply'4 pipe A1.1."lcads frein any suitalhle sourcevof gas supply, to a point beneath the burner iind is there provided with a. pluralit'v'of branch stubs l2.. each of which carries ADeswribiiig more specificallythe heater, andreferring'trstto Fig. 2, the main shell of thcfi'lei'cye. is composed of two dome- 'shaped land ,semi-spherical easing members 14 nuit-15S; li'einner-or low'or'inembcr being arraiigedin'fncsted relation to the upper ineinhei ebut 'Sspaced l'uwav .f roiii the latter throughout except at their'jeinei'l edves, so as.

to provide fa relat i vely; thin, shoet-l xke space or water .chiimber'lti inside the heater. The niei'nlier`l4 is'desirahly constructed with a straight vor approxiliiately cylindric portion iiieinbcrQL' is.' esirably, and as shown; of uniform curvature, z. -e., semi-spherical throughout, and the tivo niciiibcrs are conveniently united toform oliermet-ica'l joint at .their edges by folding the lower edge of the outermost around the corresponding edge'ot the inner member, as indicated' at 17,'

'and s'iiitxihl` soldering or otherwise-sealing` .1or '/lo'ne 14' extending from its lower edge .upwardly so'mcfdistance and then mergingl into the dome rtion'proper. 'The -in'nen being described comprises a nipple 20 suitably mounted in an opening in the shell 14 and connected with the outlet pipe by means of aunion 21.

Describingnow one of the gas burners 13 which forms the salient object ofthe present invention, each burner comprises a main stem or draftFtube 25, a jet body or plug -26 seated in the lower end of the draft-tube, a hollow head 27 circular in cross section of oblong form in' vertical section, and a perfotubeL is unobstructed throughout the remainder of its length and preferably communicates with the head 27 through an opening 32 of the full internal diameter of the draft-tube. The head is provided at its.

top with an outlet 33 which is located in alinement with the draft-tube and is preferably of the same diameter or slightly larger than the latter. The interior of the head 27 is divided by the dome-shaped diaphragm 28 preferably of wire gauze, which is conveniently secured in position by havingits peripheral edge forced intp the angle. formed at the junction of the upper and lower members of the shell which form the head, as indicated at 35. rThe curvature of the diaphragm is flatter than that ofthe upper shell of the head, so that the diaphragm stands away from the latter throughout its entire area, and as to `its portion opposite the outlet 33 is some distance inside of the latter, as shown clearly in thedrawing.

The operation of the gas burners is apparent. It is to be noted, however, that with the gas supply to the burner properly controlled, the device will burn with a short bluish green cone-shaped jet, issuing from the central part of the burner outlet 33 and surrounded by a solid volume 'of red flame, the blue flame being predominant. The heat generated by this burner is exceptionally intense, due to the fact that the burner consumes an unusually large proportion of air and that the combustion is very perfect. The device is of such simple construction that the burner may'be economically manufactured, and its construction is siich that it is substantially self regulating under varying pressures of gas. That is to say, the jets of gas passing through the jet plug entrain the' right proportion of air through the ports 31 under Wide ranges of gas pressure.

It will be obvious that the details of conl l tube and havin struction may be modiedwithout departing from the 'spirit of the invention.

I claim as my invention:

l. A gas'burner comprising a draft tube, a jet plug seated in the lower end of said tube and provided with one or more vertical jetbpenings, said draft tube having a port formed through its side at or above the upper end of said jet-plug, a hollow head approximately oblong in vertical axial section and of greater area in 'cross section than the tube at the upper end of the latter, said head having an axial inlet and an axial outlet port, said ports being substantially less in .cross sectional area than the head, and a gauzediaphragm extending across the inte- .rior of said head and separating the same,

said diaphragm being dome-shaped in cross section and extending nearly to the upper end of the head to form a restricted passage or chamber between the upper endof the diaphragm and the outlet port of the head.

2. A gas burner comprising a draft tube, a jet-plu seated inthe lower end of said tube and avinga plurality of vertical openings for the escape of t e gas, 'said tube having an air port formed in the side of the tube at or above the upper end of the jet-plug, the upper part of said tube forming a mixing chamber for the gas and air, a secondary chamber communicating with said mixing chamber and taking the form of an enlargedvilattened head having an in let and an outlet port of substantially the same cross sectional area as`the cross section of the tube, and a gauze diaphragm extendin across the entire interior of the head, sai diaphragm beingldome-shaped in cross section and ap roac ing closely the upper halLe' the hea throughout its entire area to form a restricted annular passage in` the upper end of the head.

3.- A vgas burner comprising a primary mixing chamber ltaking the form 'of an elongated tube, a jet-plug close to the lower end of the tube and having a jet opening for gas, the lower part of said tube having an air inlet port, a secondary mixing chamber communicatin with the upper end of the primary cham er and taking the form of an enlarged head` a dome-shaped auze diaphragm extending across the sai head and so dis osed as to closely approach the upper end o? the head throughout its length, said head havin inlet andoutlet ports of substantially t e same cross sectional area. as the primary mixing chamber.

4. A gas burner comprising a draft tube, a jet plug seated in the lower vend of said a vertical jet opening, an air port forme in the side of the tube and spaced at or above the upper end of this jetplug, an enlarged hollow head at the upper end of the tube :.ving inlet and outlet ports, said nead Hering outwardly as to its head being of substantially less -area than lower half and converging inwardly as to the main body of the head.

its upper half, and a, convex diaphragm FRANCIS J. DOYLE. mounted in the upper half of the head and Witnesses: 5 closely up roaching the inner wall of said FRANK L. BELKNAP,

upper hal the inlet and outlet ports of said ANNA OBRmN. 

